Information-Modeling Technology for the Environmental Monitoring - New Ecoinformatics Tools in Environmental Science: Applications and Decision-making - page 77

Table 1.15 Methane emissions from different sources recalculated for carbon equivalent (EPA
2001)
Anthropogenic source of methane 1990 1995 2000 2005 2010

Output of natural gas and oil 181.1 177.0 185.2 186.9 190.2

Animals ' vital functions 157.4 143.4 144.0 149.5 150.8

Solid waste heaps 136.9 131.4 133.9 134.4 135.5

Coal mines functioning 82.8 62.6 59.0 59.3 59.0

Processing of stock-breeding waste 27.9 26.8 28.1 29.2 29.8

Sewage processing 10.1 9.8 9.8 10.4 10.4

Other sources connected with agriculture 7.9 8.2 8.5 8.2 8.2

Industrial and municipal sectors 15.0 13.9 13.7 13.9 14.8

fluxes are given in 10 6 t C year − 1

Estimates of methane fl

Fig. 1.39 Block-diagram for formation and transport of methane in the waterlogged country.
Notation: F CH 4 is the methane flux across the atmosphere/water body interface; F CH 4 is the
oxidation of methane in aerobic zone; F CH 4 is the intensity of methane source; M is the methane
concentration

oxidation use the released energy E for the organic matter synthesis. The remaining
methane gets to the atmosphere and, in contrast to CO 2 , practically does not return
to the water medium. This is somehow connected with the fact that the CH 4
solubility in water is almost 40 times lower than that of CO 2 . The lifetime ˄ H of